diff -r ddf020d0941a -r fdfc01419815 QTfrontend/net/netudpserver.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/QTfrontend/net/netudpserver.cpp	Wed Sep 28 19:27:56 2011 +0200
@@ -0,0 +1,51 @@
+/*
+ * Hedgewars, a free turn based strategy game
+ * Copyright (c) 2007-2008 Igor Ulyanov <iulyanov@gmail.com>
+ * Copyright (c) 2008-2011 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <QUdpSocket>
+
+#include "netudpserver.h"
+
+HWNetUdpServer::HWNetUdpServer(QObject *parent, const QString & descr, quint16 port) :
+  HWNetRegisterServer(parent, descr, port),
+  m_descr(descr)
+{
+  pUdpSocket = new QUdpSocket(this);
+  pUdpSocket->bind(46631);
+  connect(pUdpSocket, SIGNAL(readyRead()), this, SLOT(onClientRead()));
+}
+
+void HWNetUdpServer::onClientRead()
+{
+  while (pUdpSocket->hasPendingDatagrams()) {
+    QByteArray datagram;
+    datagram.resize(pUdpSocket->pendingDatagramSize());
+    QHostAddress clientAddr;
+    quint16 clientPort;
+    pUdpSocket->readDatagram(datagram.data(), datagram.size(), &clientAddr, &clientPort);
+    if(datagram.startsWith("hedgewars client")) {
+      // send answer to client
+      pUdpSocket->writeDatagram(QString("hedgewars server\n%1").arg(m_descr).toUtf8(), clientAddr, clientPort);
+    }
+  }
+}
+
+void HWNetUdpServer::unregister()
+{
+  deleteLater();
+}